Water-treating compound



COATING 0R PLASY'C I March 31. 1925. 1,531993 F. N. SPELLER WATERTREATING COMPOUND Filed Feb. 23, 1923 OUTLET 4 HEATER OR BOILER RETURNL|NE HAND PUMP COMPOUND TANK,

FEED PUMP 5 V 4 VAL E 6,

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5 COMPOUND TANK lz'Zmss-es: M22507: Z f z fkq/v/r N 5 54456,

. v 6 13 fiflmqy Patented Mar. 31, 1925..

UNITED STATES ct tt 1,531,993

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To all whom it may. concern:

Be it known that I, FRANK N. Seaman, a citizen of the United States, andresident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inWater-Treating Compounds, of which the following is a specification.

This invention relates to the treating of 10 water and more particularlyto a compound for treating water for use in boilers and the like toabsorb the free oxygen,-neutralize any acidity, precipitate scale, andform a protective coating on any metal with which the water contacts.

One object of this invention is to provide a compound of this characterthat ma be made up and handled commercially wit out any appreciabledeterioration.

Another object of this invention is to provide a compound of this classthat ma be readily applied to the water suppli to, boilers, waterheaters, etc., without the installation of expensive additionalequipment.

Another objectof this'invention is to pro- 7 vide a compound forming areagent for addition to water in a heating boiler which will fix the COand free oxygen gas and thus prevent these gases being carried over withthe steam and corroding the return plpe's and radiator connections ofthe heatmg system.

In" the drawing, the figure shows two as methods of sup lying thecompound to a boiler or water eater.

The compound of this invention is composed of sodium silicate and sodiumsulphite. A concentrated solution of sodium silicate is mixed with aconcentrated solution of sodium sulphite, and the compound so formed isadded to the boiler or water heater 2 either from the tank 3 through thepipe 4 to the feed water line 5, or directly to the boiler from the tank6 by means of pump 7 and pipe 8.

It will be understood that either of the above tanks may be used aloneor both may be used, as desired. Ordinarily, however,

onllyhone source of supply will be necessa e use of the aboveingredients individuallv for treating water, has been suggestedheretofore, but due to the factthat sodium sulphite, either in solidstate or in water solution, deteriorates very rapidly when exposed tothe atmosphere and forms' sodium sulfate, no practical way hasheretofore been discovered or suggested to use it commercially.

I have discovered that by combining a concentrated solution of sodiumsilicate with a concentrated solution of sodium sulphite, preferably insubstantially equal parts, that the sodium silicate-will rotect thesodium sulphite and prevent t e deterioration thereof for a considerablelength of time, since the oxygen of the atmosphere penetrates into thesodium silicate solution very slowly; The strength of the abovesolutions may vary, but I have found by experience that the best resultsmay be obtained by combining a solution of sodium silicate havingapproximately 150 gm. of sodium silicate per liter of water with aniqifil'p'art'uf-a-sohftlion of aving approximate y 150. gm; 0 sulphiteper liter of water. N zasstated above, the sodium silicate serves toprotect the sodium sulphite from the free oxygen of the atmosphere, and,therefore, it is preferable to have the solutions in concentrated formso as to bring the ingredients into closer contact and also form adenser solution into which the oxygen will penetrate very slowly.

A combined concentrated solution of the above ingredients will absorbthe free oxygen from the water, neutralize any acidity, precipitatescale, and form a protective coating on the inside of the pipes,boilers, or other metal parts with which the water comes in contact. I

I claim i 1. com ound for deoxidizing and neutrahzmg boiler water andforming a protective coating on any metal with which the water contacts,consisting of a solution of sodium silicate and sodium sulphite.

2. compound for deoxidizing and neutral zmg boiler water and forming aprotective coating on any metal with which the water contacts,consisting of a concentrated g memos I I solution of lodium silicatecombined with solution of I, proximately 150 gm. per liter an equal partof a concentrated solution of of sodium 8' 'cate combined with an equalsodium sulphite. part of a concentrated vsolution of "approxi- 1o 8. Acompoimd for deoxidizing and neumetely 150 gm. per liter of sodiumsulphite.

5 boiler water and formmfila pro- In testimony whereof I have hereuntotective costing on any metal with w ich the signed my name. Intercontacts, consisting of a concentrated Y FRANK N. SPELLER.

